/Engine/Source/Runtime/RenderCore/Public/ShaderCodeLibrary.h
We check this early in the callstack to avoid creating a bunch ofFNameand keys and things we will never save anyway. Pass the shader platform to check or EShaderPlatform::SP_NumPlatforms to check if any of the registered types require stable keys.
static bool NeedsShaderStableKeys ( EShaderPlatform ShaderPlatform )